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Production method of yttrium-lutetium-cerium oxide used for scintillation crystals

A technology of scintillation crystals and yttrium oxide, applied in the direction of rare earth metal oxides/hydroxides, etc., can solve the problems of unclear product standards of rare earth oxides, unreasonable product cost performance, and restrictions on the application and development of downstream industries, and achieve accurate and reliable Control equipment, low cost, easy to control and amplify the effect

Active Publication Date: 2020-11-24
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of scintillation crystals with this rare earth mixture has problems such as unclear product standards of rare earth oxides, blind pursuit of high purification, and unreasonable product cost performance, which restricts its application and development in downstream industries.

Method used

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  • Production method of yttrium-lutetium-cerium oxide used for scintillation crystals
  • Production method of yttrium-lutetium-cerium oxide used for scintillation crystals
  • Production method of yttrium-lutetium-cerium oxide used for scintillation crystals

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preparation example Construction

[0029] The preparation method of yttrium lutetium cerium oxide for scintillation crystal of the present invention, wherein the general chemical formula of yttrium lutetium cerium oxide is: (Y y Lu (1-x-y) ) 2 o 3 : xCe, where x=0.001~0.01, y=0.05~0.3;

[0030] Step 1: According to the stoichiometric ratio of the three rare earth elements of yttrium, lutetium and cerium in the general chemical formula, mix the hydrochloric acid or nitric acid stripping solution of the three rare earth ions evenly, adjust the pH of the solution to 2-3 with ammonia water, and heat to 80°C , to obtain a solution.

[0031] Step 2: prepare an oxalic acid solution according to the molar ratio of the rare earth to the precipitating agent oxalic acid of 1:1.8-2.2, and heat the oxalic acid solution to 80°C to obtain b solution;

[0032] Step 3: under stirring conditions, slowly add solution a to solution b, stir for 30 minutes, leave to age for 3 to 6 hours, and filter to obtain the precipitate of y...

Embodiment 1

[0035] Embodiment 1 (Y 0.15 Lu 0.849 ) 2 o 3 :1‰Ce preparation

[0036] According to yttrium, lutetium and cerium accounting for 15%, 84.9% and 0.1% of the total rare earth, mix the yttrium chloride, lutetium chloride and cerium chloride stripping solution with the total rare earth being 0.01mol evenly, and adjust the pH value of the solution with ammonia water 2.00, heat the solution to 80°C; prepare 0.018mol oxalic acid solution, heat the solution to 80°C; under the condition of magnetic stirring, slowly add the above mixed rare earth solution into the oxalic acid solution, stir for 30min, and let it stand for 3h; Precipitate and filter to obtain solid yttrium-lutetium-cerium oxalate, and burn in a muffle furnace at 900°C for 3 hours to obtain yttrium-lutetium-cerium oxide powder. figure 1 The XRD pattern of this sample is consistent with the JCPDS standard card (43-1021) of lutetium oxide. figure 2 For the SEM of this sample, image 3 is the mapping spectrum of the s...

Embodiment 2

[0037] Embodiment 2 (Y 0.05 Lu 0.945 ) 2 o 3 :5‰Ce preparation

[0038] According to yttrium, lutetium and cerium accounting for 5%, 94.5% and 0.5% of the total rare earth, the total rare earth is 0.01mol yttrium chloride, lutetium chloride and cerium chloride stripping solution are mixed evenly, and the pH value of the solution is adjusted with ammonia water To 3.00, heat the solution to 80°C; prepare 0.02mol oxalic acid solution, heat the solution to 80°C; under the condition of magnetic stirring, slowly add the above mixed rare earth solution into the oxalic acid solution, stir for 30min, and let it stand for 4h; Precipitate and filter to obtain solid yttrium-lutetium-cerium oxalate, and burn in a muffle furnace at 1200°C for 2 hours to obtain yttrium-lutetium-cerium oxide powder.

[0039] The yttrium lutetium cerium oxide powder prepared in the above examples has the advantages of uniform distribution of rare earth elements, etc., and can meet the requirements of scint...

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Abstract

The invention relates to a production method of a yttrium-lutetium-cerium oxide used for scintillation crystals, and belongs to the technical field of extraction and separation of rare earth. The production method comprises the following steps: (1) evenly mixing reverse extraction solutions of three kinds of rare earth ions according to a stoichiometric ratio of the three rare earth elements of yttrium, lutetium and cerium, regulating a solution pH value to be 2-3 by means of ammonium hydroxide, and conducting heating to obtain an a solution; (2) producing an oxalic acid solution according toa molar ratio, ranging from 1:1.8 to 1:2.2, of total rare earth to a precipitator oxalic acid, and heating the oxalic acid solution to obtain a b solution; (3) slowly adding the a solution into the bsolution under a stirring condition, conducting stirring, allowing standing and aging for 3-6 h, and conducting filtering to obtain a yttrium-lutetium-cerium oxalate sediment; and (4) firing the yttrium-lutetium-cerium oxalate sediment in a muffle furnace at 800-1200 DEG C for 2-4 h to obtain yttrium-lutetium-cerium oxide powder. The yttrium-lutetium-cerium oxide powder produced through the production method of the yttrium-lutetium-cerium oxide used for the scintillation crystals has the advantages that the rare earth elements are evenly distributed, each element content is precise and adjustable, and the like; and a raw material can be provided for production of the scintillation crystals of LYSO, LuYAP and the like.

Description

technical field [0001] The invention belongs to the technical field of rare earth extraction and separation, and in particular relates to a preparation method of yttrium lutetium cerium oxide for scintillation crystals. Background technique [0002] Due to their unique electronic structure, rare earth elements have excellent physical and chemical properties such as light, electricity, and magnetism. They are widely used in high-tech fields such as electronic information, energy and environmental protection, national defense and military industry, high-tech materials, and biomedicine. mineral resources. For example, cerium-doped yttrium lutetium silicate (LYSO), yttrium lutetium aluminate (LuYAP) and other scintillation crystals have excellent properties such as high density, high light output and short decay time, and are widely used in the fields of high energy physics, nuclear physics, nuclear medicine and safety detection have a broad vision of application. For example:...

Claims

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Application Information

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IPC IPC(8): C01F17/241
CPCC01P2002/72C01P2004/03C01F17/241
Inventor 陈继邓岳锋李德谦常永青刘郁李海连
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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